Home

Wolf WKGD 126621 Convection Oven User Manual

1. 16 ie 8 9 10 C NO N 120 240 VAC VAC TSP1448C 6 Check for proper voltage across terminals 8 amp 9 120VAC or terminals 8 amp 10 208 240VAC for power to the control A If correct proceed to step 7 B If incorrect problem is not with the temperature control See troubleshooting section 7 Check relay voltages on the board A For 120VAC controls check across terminals 7 amp 9 for input to the internal relay and 6 amp 9 for output from the internal relay B For 208 240VAC controls check across terminals 7 amp 10 for input to the internal relay and 6 amp 10 for output from the internal relay 1 If input voltage to the internal relay is correct proceed to step 8 If input voltage to the internal relay is not present problem is not with the temperature control See troubleshooting section 2 If output voltage from the internal relay is correct proceed to step 8 If output voltage from the internal relay is not correct check temperature probe as outlined under TEMPERATURE PROBE TEST WKGD WKGDX 8 Setthe temperature control to the minimum setting NOTE Oven temperature must be above 300 F 9 Check for zero 0 volts AC across terminals 6 amp 9 120VAC or 6 amp 10 208 240VAC for no output from the internal relay
2. Page 4 of 64 FULL SIZE GAS CONVECTION OVENS REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS COVERS AND PANELS WARNING DISCONNECT THE a ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT TAGOUT PROCEDURES Front Cover 1 The top front cover is secured with four 4 screws two on each side of cover Remove these screws then remove the cover from the oven REMOVE SCREWS lt FRONT COVER e MASTER SWITCH Qo over coot HEAT TEMPERATURE 11806 SEE 2 Reverse the procedure to install Bottom Front Cover 1 The bottom front cover is secured with four 4 Screws two on each side of cover Remove these screws then remove the cover from the oven REMOVE SCREWS BOTTOM FRONT COVER TSP1422C 2 Reverse the procedure to install Control Panel 1 Remove three 3 screws on the right side which secure the control panel then pull the panel away from the oven Page 5 of 64 CONTROL lt sev WKGO SHOWN NOTE If the oven has a mechanical KX type thermostat it must be removed from the control panel first before removing the control panel 2 Disconnect the temperature probe leads from the solid state temperature c
3. lt ak s gg nm Ri mg GE ED cC CN is UC GN Page 61 of 64 F32700 February 2006 FULL SIZE GAS CONVECTION OVENS TROUBLESHOOTING TROUBLESHOOTING WARNING CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE EXERCISE EXTREME CAUTION AT ALL TIMES IF TEST POINTS ARE NOT EASILY ACCESSIBLE DISCONNECT POWER AND FOLLOW LOCKOUT TAGOUT PROCEDURES ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST ALL MODELS SYMPTOMS POSSIBLE CAUSES Blower motor doesn t run with 1S in OVEN COOL Line voltage position Power switch S1 malfunction Switch S3 malfunction Interconnecting wiring malfunction Motor inoperable Blower motor doesn t run in ON position OVEN Door switch malfunction COOL functions OK Power switch contacts inoperative Interconnecting wiring malfunction Shorted electrode on ignitor flame sense Ignitor cable high voltage OPEN Heat relay R3 malfunction Transformer T1 inoperative High limit thermostat open Interconnecting wiring malfunction Ignition Module malfunction Sparks but gas does not ignite Gas solenoid valve OFF or inoperative Manual gas valve CLOSED Gas supply OFF or Insufficient gas pressure Interconnecting
4. u au aaa uyar ap ie eI ee xu SERVICE PROCEDURES AND 1 Solid State Temperature Control Calibration WKGD WKGDX Mechanical Thermostat Calibration WKG WKGX Solid State Temperature Control Test WKGD WKGDX Temperature Probe Test WKGD WKGDX 1 Gas Pressure 2 Verification of Spark at Ignitor Door Switch Adjustment 1 Blower Adjustment 2 Door Adjustment reds ERR EU Door Catch Ball Adjustment Independent Doors Door Chain Adjustment Simultaneous Doors F32700 February 2006 Page 2 of 64 FULL SIZE GAS CONVECTION OVENS Computer Control WKGC WKGCX 26 Computer Control Calibration WKGC WKGCX 1 27 ELECTRICAL OPERATION
5. 28 Component Function 28 Component Location 4 30 Sequence 35 WKG WKGX with Roast Hold Option Mechanical KX Thermostat 35 WKGD WKGDX with Roast amp Hold Option Solid State Temperature Control 39 Oven Cool Cycle Solid State Temperature Control 43 WKGCX Roast amp Hold Standard on Computer Model 44 Oven Cool Cycle Computer Control Model 46 SGHEMATIGS tent cs s st un au Lata LOL 47 WKG WKGX Mechanical KX Controls 47 WKG WKGX Mechanical KX Controls Roast amp Hold Option 48 WKGD WKGDX Solid State Temperature Control 49 WKGD WKGDX Solid State Temperature Control Roast amp Hold Option 50 WKGCX Computer Control Roast amp Hold Standard 51 WIRING BIAGRAMS 52 e bbb Ace Yen aba oe npe 52 WKG WKGX Mechanical KX Controls 2 52 WKG WKGX Mechan
6. T 200 240 DOOS Sets db WHEH OVEM DOCERE ABE OPER FOR ROAST amp HOLD OPERATION SJ BE THE RAS PORTION AND R L H TIMER USED GAS CONVECTION OVEN ROAST amp HOLD 5 CONTROL 10834 F32700 February 2006 Page 50 of 64 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION WKGC WKGCX Computer Control Roast amp Hold Standard y DDOR APER OFEN WHEN THE OOO ARE DPEN WKGC WKGCX GAS CONVECTION COMPUTER CONTROL 10825 Page 51 of 64 F27700 February 2006 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION WIRING DIAGRAMS WKG WKGX Mechanical KX Controls 5 wr muse Sram met s n E 4 BILAT LATIS H rawr DeC pur 13 TE GE V rere maar pen UESEFTSR PAGE 10 2 SEE 10837 10836 F32700 February 2006 n 52 of 64 _ FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION 10837 SEE 10836 PAGE 2 0F 2 GAZ CONVLCTION OWEN CONTROL SINGLE BURNER TATVAG OR ZO0 240VC 9 oe a atan F32700 February 2006 Page 53 of 64 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION WKG WKGX Mechanical KX Controls Roast amp H
7. F32700 February 2006 If correct temperature control is functioning properly B If incorrect check temperature probe as outlined under TEMPERATURE PROBE TEST WKGD WKGDX 1 If temperature probe is ok replace the temperature control and check calibration as outlined under SOLID STATE TEMPERATURE CONTROL CALIBRATION WKGD WKGDX TEMPERATURE PROBE TEST WKGD WKGDX WARNING DISCONNECT THE ace ELECTRICAL POWER TO THE 727 MACHINE AND FOLLOW LOCKOUT e TAGOUT PROCEDURES dp d NOTE The temperature probe used in conjunction with the Solid State Temperature control is an RTD resistance temperature detector of the Thermistor type As temperature increases the resistance value decreases 1 Remove the right side panel as outlined under COVERS AND PANELS in REMOVAL AND REPLACEMENT OF PARTS NOTE If right side panel is not accessible this component can be serviced by removing the control panel as outlined under COVERS AND PANELS 2 Place a shielded thermocouple in the geometric center of the oven cavity and determine the temperature in the oven cavity 3 Remove the probe lead wires from the solid state temperature control 4 probe with an ohmmeter A Ifthe measured resistance values inside the given tolerance then the probe is functioning properly B If the measured resistance values are outside the given tolerance then replace the probe and retest 1 Check oven for prope
8. 4 Remove the lower door seal strip to expose the mounting screws of the door assembly A Remove the two 2 lower sill bolts by the lower door shaft and the four 4 counter sunk screws from the lower sill F32700 February 2006 FULL SIZE GAS CONVECTION OVENS REMOVAL AND REPLACEMENT OF PARTS NOTE The door assembly is heavy and will drop down once the last screw is removed If removing door assembly with out assistance the ignition cable flame sense lead and gas manifold should also be removed to avoid damage to these components 5 Lift up on the door assembly and swing the right side out then move the assembly to the left to clear the slots in the upper door sill 6 Lay the door assembly on a flat cushioned surface for disassembly 7 Reverse procedure to install door assembly and check for proper adjustment as outlined under DOOR ADJUSTMENT DOOR CHAIN ADJUSTMENT SIMULTANEOUS DOORS and DOOR SWITCH ADJUSTMENT in SERVICE PROCEDURES AND ADJUSTMENTS Disassembly 1 Remove the door assembly as outlined in OVEN DOORS SIMULTANEOUS under ASSEMBLY REMOVAL 2 Remove the door chain by loosening one of the turnbuckles 3 Loosen the set screw on the sprocket of door being replaced 4 Drive out the spiral pin from the sprocket of door being replaced 5 Remove the door from lower sill bearings and sprocket DOOR ASSEMBLY SIMULTANEOUS DOORS SHOWN A Door assembly parts
9. N O side of internal relay contacts terminal 7 on the temperature control board 3 Poweris also connected back through a second set of contacts on the power switch S1 to terminal 8 on the temperature control board a Solid state temperature control energized If the oven temperature is below set point the temperature control will energize its internal relay The normally open N O contacts close and apply power to the following components a b F32700 February 2006 Heat light clear comes ON Power is connected through the centrifugal switch contacts on the convection fan motor heat relay R3 is energized R3 contacts N O close and the heating circuit is powered Ignition control module is energized No ignition light red comes ON module performs a self diagnostic test for 4 seconds 2nd valve main on the gas valve is energized Gas starts to flow to the burner sparking begins the NO IGNITION light goes out and burner lights Sparking continues for up to 7 seconds or until a flame is established If a flame is SENSED the NO IGNITION light stays out and burner remains lit If a flame is not SENSED after 7 seconds of sparking the NO IGNITION light comes back 2 valve main on the gas valve is de energized and gas flow to the burner stops Ignition trial cycle repeats after a 15 second purge between cycles for two additional tries before locking out To reset a
10. SERVICE MANUAL WKG SERIES FULL SIZE GAS CONVECTION OVENS MODEL ML WKG 126620 WKGD 126621 WKGC 126622 WKGX 126623 WKGDX 126624 WKGCX 126625 WKGD2 WITH ROAST amp HOLD SHOWN NOTICE This Manual is prepared for the use of trained Wolf Range Service Technicians and should not be used by those not properly qualified If you have attended a Wolf Range Service School for this product you may be qualified to perform all the procedures described in this manual This manual is not intended to be all encompassing If you have not attended a Wolf Range Service School for this product you should read in its entirety the repair procedure you wish to perform to determine if you have the necessary tools instruments and skills required to perform the procedure Procedures for which you do not have the necessary tools instruments and skills should be performed by a trained Vulcan Service Technician Reproduction or other use of this Manual without the express written consent of Wolf Range is prohibited For additional information on Wolf Range or to locate an authorized parts and service provider in your area visit our website at www wolfrange com WOLF RANGE DIVISION OF ITW FOOD EQUIPMENT GROUP LLC LOUISVILLE KY 40201 0696 F32700 February 2006 FULL SIZE GAS CONVECTION OVENS TABLE OF CONTENTS GENERAL p Seis ante ceed ka cC PC atre eyi EE Operation bade LEM NOE
11. a Ignition control module is energized b No ignition light red comes ON module performs a self diagnostic test for 4 seconds 2nd valve main on the gas valve is energized Gas starts to flow to the burner sparking begins the NO IGNITION light goes out and burner lights Sparking continues for up to 7 seconds or until a flame is established If a flame is SENSED the NO IGNITION light stays out and burner remains lit If a flame is not SENSED after 7 seconds of sparking the NO IGNITION light comes back on 274 valve main on the gas valve is de energized and gas flow to the burner stops Ignition trial cycle repeats after a 15 second purge between cycles for two additional tries before locking out To reset after a lockout turn power switch 51 OFF then ON 4 Oven reaches set temperature and controlling thermostat opens A light goes out B Power removed from heat relay R3 Page 37 of 64 32700 February 2006 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION 1 R3normall open N O contacts open a Ignition control module de energized a Power removed from 274 valve main on the gas valve and gas flow to the burner stops NOTE This is considered first stage cooking in the ROAST AND HOLD cycle 5 oven will continue to cycle on the controlling thermostat until one of the following occurs ROAST amp HOLD time R amp H coo
12. o Z E e lt 4 ON h SCREWS UMP 8 SAY Z 15352 3 Disconnect the lead wires and igniter cable from the ignition module board REMOVE LEADS AND ARR IGNITION CONTROL MODULE 5353 4 Remove the ignition module board from the mounting bracket 5 Reverse the procedure to install the replacement ignition module board SPARK IGNITER AND FLAME SENSE 4 WARNING DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT m TAGOUT PROCEDURES WARNING SHUT OFF THE GAS BEFORE SERVICING THE UNIT 1 Remove the gas burner as outlined under GAS BURNER 2 Remove the screws securing the ignitor and flame sense to burner then remove the assembly Page 10 of 64 FULL SIZE GAS CONVECTION OVENS REMOVAL AND REPLACEMENT OF PARTS 3 Reverse the procedure to install the assembly and check for proper operation NOTE Check to ensure the spark gap distance is approximately 1 8 If the gap appears to be excessive or poor sparking is then adjust BLOWER AND MOTOR Rap WARNING DISCONNECT THE a4 ELECTRICAL POWER TO THE S MACHINE AND FOLLOW LOCKOUT Se TAGOUT PROCEDURES WARNING SHUT OFF THE GAS BEFORE SERVICING THE UNIT 1 Take out the racks and rack supports 2 Remove screws securing the SNORKEL and remove the snorkel Page 11 of 64 Remove screws securing baffle panel and
13. om Page 41 of 64 NOTE Power is available to the oven light switch wire 20 to turn the oven cavity lights ON when the light switch is turned ON and power is available to the normally open N O side wire 28 of the door switch contacts and connects power to additional components when the door switch contacts are CLOSED door closed 1 Transformer T1 energized a Power 24VAC to one side of the following components heat relay R3 normally open N O contacts high limit connected through the normally closed N C contacts to the 1 valve safety on the dual solenoid gas valve a 1 valve safety on the gas valve energized NOTE Gas does not flow to the burner until the 274 valve main is energized 2 With door switch closed power is applied to motor speed Hi Low relay R1 normally open N O contacts and hold relay R2 common C a Motor speed relay R1 is energized through hold relay R2 normally closed contacts N C Relay contacts R1 change state and the normally open N O set of contacts close a Power is connected through the function switch S3 contacts and convection fan motor is energized fan speed low NOTE In the ROAST amp HOLD cycle the fan speed is fixed at low b When the convection fan motor reaches operating speed the centrifugal switch N O on the motor closes c Power to normally open N O side of internal relay contacts terminal
14. 7 on the temperature control board 3 Power is also connected back through a second set of contacts on the power switch S1 to terminal 8 on the temperature control board F32700 February 2006 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION a Solid state temperature control energized If the oven temperature is below set point the temperature control will energize its internal relay The normally open N O contacts close and apply power to the following components a Heat light clear comes ON b Power is connected through the centrifugal switch contacts on the convection fan motor heat relay R3 is energized R3 contacts N O close and the heating circuit is powered C Ignition control module is energized d No ignition light red comes ON module performs a self diagnostic test for 4 seconds 2nd valve main on the gas valve is energized Gas starts to flow to the burner sparking begins the NO IGNITION light goes out and burner lights Sparking continues for up to 7 seconds or until a flame is established If a flame is SENSED the NO IGNITION light stays out and burner remains lit If a flame is not SENSED after 7 seconds of sparking the NO IGNITION light comes back on 274 valve main on the gas valve is de energized and gas flow to the burner stops Ignition trial cycle repeats after a 15 second purge between cycles for two additional tries before locking out To reset
15. OR 200 240 mtm amp mE 2 AB STARTING PORTION FOR THERMCHETAT ES OFF CONTACTS OPEN DOOR SWITCH B OPEN WHEN THE DOORS ARE DPTH WITH KX CONTROL GAS CONVECTION OVEN 10831 F32700 February 2006 Page 47 of 64 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION WKG WKGX Mechanical KX Controls Roast amp Hold Option SUS SSS 120 VULT Li OR 200 2401 AA PSEBMCHTAT CONTACTI PU fiy DOOR EATER WHEN DONE ARE A HOLD 81 MUST BE iN THE CORB 8 H PORTEN ANO RA TIER MUST Uie WKG WKGX GAS CONVECTION OVEN ROAST amp HOLD KX CONTROL 40832 F32700 February 2006 T Page 48 of 64 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION WKGD WKGDX Solid State Temperature Control 120 VOLT a ae LIE Huet Bu 200 240V Le u BLAC L TT 5 DOOR EWITCH ES OPEN WHEN THE DOORS ARE WKGD WKGDX GAS CONVECTION OVEN SOLID STATE CONTROL 40833 Page 49 of 64 F27700 February 2006 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION WKGD WKGDX Solid State Temperature Control Roast amp Hold Option EI BLACK _ __ 120 VOLT
16. TIMER LIGHT WKGX 10824 10823 F32700 February 2006 Page 6 of 64 FULL SIZE GAS CONVECTION OVENS REMOVAL AND REPLACEMENT OF PARTS COMPONENT PANEL COMPONENTS Removable Components Procedure WARNING DISCONNECT THE a ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT er Se TAGOUT PROCEDURES 1 Remove the right side panel as outlined under COVERS AND PANELS NOTE If right side panel is not accessible this component can be serviced by removing the control panel as outlined under COVERS AND PANELS 2 Disconnect the wire leads to the component being replaced 3 Remove the component 4 Reverse the procedure to install the replacement component and check oven for proper operation COMPONENT PANEL STANDARD OVEN CONTROLS MECHANICAL OF SOLID STATE CONTROLS ur m mH p 4 gt DETE acra o ms voce Bn 1 7 m i1 WEG WROD WEOGDX 10824 COMPONENT PANEL ROAST AND HOLD OPTION MECHANICAL OR SOLID STATE CONTROLS Page 7 of 64 Ce WKGCX F32700 February 2006 FULL SIZE GAS CONVECTION OVENS REMOVAL AND REPLACEMENT OF PARTS TEMPERATURE PROBE WKGD WKGDX Be WARNING DISCONNECT THE a ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT TAGOUT PROCEDURES
17. a self diagnostic test for 4 seconds 2nd valve main on the gas valve is energized Gas starts to flow to the burner sparking begins the NO IGNITION light goes out and burner lights Sparking continues for up to 7 seconds or until a flame is established If a flame is SENSED the NO IGNITION light stays out and burner remains lit If a flame is not SENSED after 7 seconds of sparking the NO IGNITION light comes back on 274 valve main on the gas valve is de energized and gas flow to the burner stops Ignition trial cycle repeats after a 15 second purge between cycles for two additional tries before locking out To reset after a lockout turn power switch 51 OFF then ON F32700 February 2006 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION 3 Oven reaches set point temperature A Computer control de activates the 120VAC output to heat relay R1 1 Heat relay R1 de energized and the normally open N O contacts OPEN a Power removed from ignition control module a 2 valve main on the gas valve is de energized and gas flow to the burner stops B Oven HEAT LIGHT on the control goes out C Oven READY LIGHT on the control comes ON D Electronic beeper sounds momentarily 4 The oven will continue to cycle on the computer control until the doors are opened or power switch S1 is turned to the OFF or OVEN COOL position Temperature and Time Cycle Cooking NOTE The comp
18. are now accessible for inspection and or replacement if necessary 6 Reverse procedure to re assemble the door assembly parts and check for proper adjustment as outlined under DOOR CHAIN ADJUSTMENT SIMULTANEOUS DOORS in SERVICE PROCEDURES AND ADJUSTMENTS F32700 February 2006 DOOR CATCH BALL ASSEMBLY INDEPENDENT DOORS WARNING DISCONNECT THE 275 ELECTRICAL POWER TO THE S MACHINE AND FOLLOW LOCKOUT 4 TAGOUT PROCEDURES 1 Remove the top front cover as outlined under COVERS AND PANELS 2 Remove the screws that secure the door catch assembly DOOR CATCH ASSEMBLY S SYS REMOVE SCREWS 2 DOOR STRIKE 3 Reverse procedure to install 4 Adjust the ball catch as outlined under DOOR CATCH BALL ADJUSTMENT INDEPENDENT DOORS in SERVICE PROCEDURES AND ADJUSTMENTS DOOR WINDOW WARNING DISCONNECT THE 275 ELECTRICAL POWER TO THE S MACHINE AND FOLLOW LOCKOUT Se TAGOUT PROCEDURES 1 Remove the screws at the top and bottom of door Page 14 of 64 FULL SIZE GAS CONVECTION OVENS REMOVAL AND REPLACEMENT OF PARTS OVEN CAVITY REMOVE SCREWS GLASS L Cie e TSP1426 2 Independent doors A Remove the door handle then remove the outer door panel B Lift out the inner door panel and window assembly NOTE Left door only remove door seal from the inside
19. complete cycles Calculate the differential by subtracting the temperature indicated when heat lamp goes out from temperature indicated when heat lamp comes on Differential Heat lamp OFF Heat lamp ON Example 360 lamp off 340 lamp on 20 A differential calculated should be less than 30 F 1 If the differential is less than 30 the thermostat is functioning properly a Proceed to step 7 2 Ifthe differential is more than 30 F the thermostat is malfunctioning Install a replacement thermostat and check calibration Calculate the average temperature by adding the temperature indicated when the heat lamp goes out to the temperature indicated when the heat lamp comes on and dividing this answer by 2 Temp lamp off Temp lamp on 2 Average Temp Example 360 340 2 350 A Ifthe average temperature is less than 15 F from the dial setting the thermostat is properly calibrated B If the average temperature is more than 15 F of the dial setting the thermostat calibration must be adjusted 1 Remove the thermostat knob 2 Hold the thermostat shaft and turn the inner set screw clockwise to decrease temperature or counterclockwise to increase temperature 1 4 turn 35 F Replace the knob and repeat step 7 until the average temperature is within tolerance Page 19 of 64 NOTE Allow the oven to cycle at least two times between adjustments before p
20. motor speed relay coil R1 hold relay coil R2 and the component cooling fan Oven properly grounded Gas supply valve ON Gas combination control valve ON Power switch 51 OFF Function switch S3 set to ROAST amp HOLD cycle G Oven light switch S2 ON OFF position has no affect on the function of the Roast amp Hold cycle m IM H Control thermostat in the OFF position OPEN 1 High limit switch CLOSED Page 36 of 64 M FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION Roast timer normal cooking in the OFF position Roast and Hold timer in the OFF position Oven doors Closed 1 Door switch contacts CLOSED Oven cavity temperature below 140 F 2 Set controlling thermostat to desired ROAST then Hold temperature Roast amp Hold cooking NOTE This is considered first stage cooking in the ROAST amp HOLD cycle A Internal contacts close 3 Power switch 51 turned ON A Power to motor speed Hi Low relay R1 normally open N O contacts and hold relay R2 common C Component cooling fan energized Power ON light Amber comes ON Power to one side of the following components Normal ROAST timer terminal 1 ROAST amp HOLD timer terminal 1 transformer primary T1 NOTE Power is available to the oven light switch wire 20 to turn the oven cavity lights ON when the light switch is turned ON and power is available to the normally ope
21. necessary place shims between motor and frame PLACE SHIMS UNDER REAR OF 1 4 INCH AT MOTOR TO WIDEN TOP SPACE ALL PLACES TOP A e lt lt BLOWER lt WASHER 47 PLACE SHIMS HERE Bx noun WHEN NEEDED WASHER BOTTOM PLACE SHIMS UNDER FRONT OF MOTOR TO WIDEN BOTTOM SPACE MOTOR MOUNTING PLATE TSP1428 Reverse the procedure to install Page 23 of 64 v n 32700 February 2006 FULL SIZE GAS CONVECTION OVENS SERVICE PROCEDURES AND ADJUSTMENTS DOOR ADJUSTMENT WARNING DISCONNECT THE ace ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT TAGOUT PROCEDURES 59 1 Check the doors to make sure they have equal gap between them and that the vertical edge of the door is parallel to the vertical door seal If the doors are not positioned in this manner adjust the doors as described lt EQUAL GAP lt lt EQUAL GAP lt TSP302 Remove the top front cover Loosen the screws that secure the upper door bearings and related hardware just enough to allow door movement UPPER LOOSEN BEARING SCREWS DOOR SHAFT CON
22. oe aay Lead ebbe Lat Gleaning Ae Pe ae ee SA ee RA ee Lubrication aria be tuns thee dene date a h Pater aub a a Control Panel Components Component Panel Components Temperature Probe WKGD WKGDX GasiBUInel 3s toe ertet tacet Nette UR Gas deo te Gas Solenoid Sot eis PERO Vent uve ip ebria edi daw Ignition Control Modules 2 xe te Iu ER ECHERSUE M RR ERR Ex e ERR ido enata Spark Igniter and Flame Sense Blower and Motor ve tee pee REESE Gadi E van epa E dia gren ea Oven Doors and Bearings Independent Doors Oven Doors Simultaneous 000 000s Door Catch Ball Assembly Independent Doors Beige e P UT Door SWIICli eds esM ALME A D abut fiet Mechanical Kx Thermostat WKG WKGX High Limit Thermostat 2 2 23i eme E emere d aam dr EP e b ra Cooling Fan x o eee
23. remove the panel BAFFLE PANEL T If replacing A Blower Only Loosen set screws on blower hub and using a bearing puller remove blower from motor shaft 1 Reverse procedure to install and adjust blower position as outlined under BLOWER ADJUSTMENT in SERVICE PROCEDURES AND ADJUSTMENTS B Motor perform step 4A and continue procedure Remove the screws securing the air baffle to the rear wall at the lower right hand corner F32700 February 2006 FULL SIZE GAS CONVECTION OVENS REMOVAL AND REPLACEMENT OF PARTS 6 10 11 12 F32700 February 2006 AIR BAFFLE ETE Remove the nuts that secure the motor mounting plate to the rear wall Place a piece of cardboard on the bottom of the oven cavity to protect its surface from any damage during motor assembly removal Pull the motor assembly into the oven cavity and place it on the cardboard Remove the junction box cover from the motor disconnect lead wires and remove the conduit Remove motor mounting bolts and flat washers then lift the motor from the mounting plate Position the replacement motor on the motor mounting plate and install mounting bolts and washers Hand tighten mounting bolts only Reconnect lead wires at the motor replace conduit and junction box cover NOTE Check data plate on motor for wiring schematic The motor must rotate clockwise when viewed from the shaft en
24. the glass lens for the light being replaced then unscrew the bulb 3 Replace bulb then reverse the procedure to install F32700 February 2006 Page 16 of 64 FULL SIZE GAS CONVECTION OVENS REMOVAL AND REPLACEMENT OF PARTS E id LENS OVEN CAVITY TSP1430 Lamp Assembly s WARNING DISCONNECT THE ELECTRICAL POWER THE a MACHINE AND FOLLOW LOCKOUT gt 2 TAGOUT PROCEDURES 1 Remove the lens and bulb 2 Remove the springs from the retaining tabs 2 places on the socket RETAINING TABS CROSS SECTIONAL VIEW TsP1313C SPRING 3 Depress the retaining tabs and pull the socket out from the oven far enough to disconnect the lead wires 4 Remove the socket from the oven 5 Attach the lead wires to the replacement socket 6 Insert the socket into the hole in the oven and push until the socket is held in place by the retaining tabs 7 Install the light bulb and lens 8 Check for proper operation Page 17 of 64 COOLING FAN M WARNING DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT TAGOUT PROCEDURES 1 Remove the right side panel as outlined under COVERS AND PANELS NOTE If right side panel is not accessible this component can be serviced by remov
25. timer terminal 1 transformer primary T1 NOTE Power is available to the oven light switch wire 20 to turn the oven cavity lights ON when the light switch is turned ON and power is available to the normally open N O side wire 28 of the door switch contacts and connects power to additional components when the door switch contacts are CLOSED door closed 1 Transformer T1 energized a Power 24VAC to one side of the following components heat relay R3 normally open N O contacts high limit connected through the normally closed N C contacts to the 1 valve safety on the dual solenoid gas valve a 1 valve safety on the gas valve energized NOTE Gas does not flow to the burner until the 274 valve main is energized 2 With door switch closed power is applied to motor speed Hi Low relay R1 normally open N O contacts and hold relay R2 common C F32700 February 2006 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION a Moto r speed relay R1 is energized through hold relay R2 N C chan open a normally closed contacts Relay contacts R1 ge state and the normally N O set of contacts close Power is connected through the function switch S3 contacts and convection fan motor is energized fan speed hi When the convection fan motor reaches operating speed the centrifugal switch N O on the motor closes Power to normally open
26. used to explain the electrical sequence of operation for both the Normal ROAST cycle normal cooking and the ROAST amp HOLD cycle Normal Roast Cycle 1 Conditions A Oven connected to correct voltage 1 L1 HOT to power switch S1 2 L2 NEUTRAL or SECOND LINE to one side of the following components power ON light heat light oven cavity lights buzzer ROAST timer motor normal cooking ROAST amp HOLD timer motor heat relay coil R3 convection fan motor common C transformer primary T1 relay coil R4 motor speed Hi Low relay coil R1 hold relay coil R2 and the component cooling fan Oven properly grounded Gas supply valve ON Gas combination control valve ON Power switch 51 OFF Im EX cycle G Oven light switch S2 ON OFF position has no affect on the function of the Normal ROAST cycle H Control thermostat dial in the OFF position OPEN l High limit switch CLOSED J Roast timer normal cooking in the OFF position K Roast Hold timer in the OFF position L Oven doors CLOSED 1 Door switch contacts CLOSED M Oven cavity temperature below 140 F 2 Set thermostat to desired Normal ROAST temperature normal cooking A Internal contacts close 3 Power switch S1 turned ON A Power to motor speed Hi Low relay R1 normally open N O contacts and hold relay R2 common C B Component cooling fan energized Page 35 of 64 Fu
27. wiring malfunction Ignition Module malfunction Gas ignites but will not maintain flame Igniter lead connections malfunction Ignitor ground inoperative Ignitor flame sense malfunction Insufficient gas pressure Snorkel vent plugged obstructed or missing Incorrect polarity from transformer T1 to Ignition module Excessive or low heat Temperature probe malfunction on models WKGD WKGDX Thermostat malfunction on models WKG WKGX 2 Temperature control board malfunction 3 Gas pressure Insufficient 4 Gas orifice plugged or obstructed Mechanical Timer inoperative or not functioning Interconnecting wiring malfunction properly 2 Line voltage incorrect 3 Timer malfunction F32700 February 2006 62 of 64 FULL SIZE GAS CONVECTION OVENS TROUBLESHOOTING SYMPTOMS POSSIBLE CAUSES Normal Roast mode OK no Hold mode Roast amp Hold models only 1 Roast and Hold switch 53 malfunction 2 R2 hold relay malfunction 3 Roast amp Hold timer malfunction 4 Interconnecting wiring malfunction Component cooling Fan does not run 1 Motor inoperable 2 Interconnecting wiring malfunction Uneven Cooking 1 Convection Fan motor speed direction 2 Poor combustion A Gas pressure incorrect B Exhaust vent plugged or obstructed C Snorkel Vent plugged or obstructed Air flow Baffles missing or damaged High ambient temperatures 3 Intermittent problems 1 2 Wiring c
28. 1 Remove the right side panel as outlined under COVERS AND PANELS NOTE If right side panel is not accessible this component can be serviced by removing the control panel as outlined under COVERS AND PANELS 2 Disconnect the probe leads from the temperature control 3 Remove the racks and right rack support 4 Remove probe clips from probe 5 Push the probe through the opening in cavity side wall and into the control panel area INSIDE CONTROL COMPARTMENT INSIDE OVEN CAVITY PANEL WALL 5316 NOTE The hole in the oven cavity wall does not line up straight with the oven cavity outer shell therefore the probe must be removed at an angle 6 Reverse the procedure to install the replacement probe F32700 February 2006 7 Adjust the temperature control as outlined under SOLID STATE TEMPERATURE CONTROL CALIBRATION WKGD WKGDX in SERVICE PROCEDURES AND ADJUSTMENTS GAS BURNER WARNING DISCONNECT THE ELECTRICAL POWER TO THE Beg MACHINE AND FOLLOW LOCKOUT Ww TAGOUT PROCEDURES WARNING SHUT OFF THE GAS BEFORE SERVICING THE UNIT 1 Remove the lower front cover as outlined under COVERS AND PANELS 2 Disconnect the ignition cable and the flame sense lead wire IGNITION FLAME SENSE CABLE EAD 3 Remove the bolts securing the gas manifold and place manifold aside 4785 4 Remove the screws securing the burner cover then lift out BUR
29. 3 TSP1429 F32700 February 2006 4 Move the door until proper alignment is achieved then tighten the screws on the upper door bearing hardware Repeat step 3 and 4 on the opposite door if necessary DOOR CATCH BALL ADJUSTMENT INDEPENDENT DOORS dtn WARNING DISCONNECT THE 25 ELECTRICAL POWER TO THE ay MACHINE AND FOLLOW LOCKOUT TAGOUT PROCEDURES Remove top front cover as outline under COVERS AND PANELS in REMOVAL AND REPLACEMENT OF PARTS Open the doors and inspect door strike for proper shape DOOR STRIKE TOP VIEW ALL DIMEMSIONS APPROXIMATE SIDE VIEW am sz DOOR OVEN SIDE 6810 3 A Replace if bent and adjust as outlined in this procedure Open and close the doors several times while observing the catch ball operation A Replace if malfunctioning and adjust as outlined in this procedure NOTE Shims may be required under the door strike before the proper door tension adjustment can be set Page 24 of 64 FULL SIZE GAS CONVECTION OVENS SERVICE PROCEDURES AND ADJUSTMENTS 4 Apply lubricant at the top of the door catch assembly to lubricate the internal spring See LUBRICATION under GENERAL APPLY DOOR CATCH LUBRICANT ASSEMBLY 10464 5 Close the doors and check them for proper alignment A Doors should be centered and parallel at the top and bottom in the oven cavity opening as outline
30. F Computer Control WKGC WKGCX Monitors temperature sensor and regulates the oven cavity temperature by controlling the heat relay R1 through the blower motor centrifugal switch contacts Also counts the ROAST time normal cooking of the product and signals the electronic alarm at the end of the cycle If ROAST amp HOLD mode is selected when the ROAST then hold time expires the oven heating stops and the oven enters HOLD mode Once the oven cavity temperature drops to 150 F the heat comes back on and the oven cycles at this temperature to hold the cooked product Roast amp Hold is standard on computer models SSR1 amp SSR2 WKGC WKGCX When SSR1 is energized by computer control connects power to blower motor for Hi fan speed operation in normal ROAST mode In ROAST amp HOLD Mode only SSR1 is de energized and SSR2 is energized by computer control and connects power to blower motor for Low fan speed operation Ignition Control Module Controls the gas ignition cycle Energizes the 2 valve main on the dual solenoid gas valve generates spark for burner ignition monitors the presence of a flame and controls the No Ignition light The ignition times are 4 second self diagnostic test initial power ON 7 second ignition trial 3 ignition trials with a 15 second purge between each trial Igniter Flame Sense Ignites the gas and senses the presence of a flame The flame presence generat
31. ICAL OPERATION FEMALE i 2 m a 05 Tid saam n m masa Teie E npm Fi WEGO GAZ CONVECTION OVEN SOLID STATE CONTROL WITH ETAST i HOLD SINGLE TROVAT OR 200 24 0VC 1PH ae PAGE 2 OF 2 SEE 10842 10843 Page 59 of 64 F27700 February 2006 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION WKGC WKGCX Computer Control Roast amp Hold Standard mU 4 var uv CONTA WATLEY PH LEHTIMEILATIE 28 fw zu F32700 February 2006 i Ss 60 64 CORNET TOR SHORT C 4 7 Tog omen ites ar 3 goa B agr Seit t k IN F a edm k id Qoae rm ri n Toad HIS 3 lt spi i jx fae m t m n nwt EE Dd a 3 22 a Fm D PAGE 1 OF 2 SEE 10845 10844 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION DOOR 5SWICH 00 LI I LI P 7 LI gre Ig ura 2 a _ ROTATION
32. NDS FOR THIS TEST THE MANUAL M V 57 GAS VALVE MUST BE CLOSED 3 Clamp the ignition cable a manner that will position the end of the cable 3 16 from the oven frame bare metal surface NOTE It is critical that the cable be held 3 16 away from the surface of the oven frame or sparking may not occur even though the sparking circuit is functioning properly IGNITION CABLE 4 Install the top front cover 5 Apply power to the oven and check for proper operation F32700 February 2006 22 of 64 FULL SIZE GAS CONVECTION OVENS SERVICE PROCEDURES AND ADJUSTMENTS BLOWER ADJUSTMENT LOCKOUT TAGOUT PROCEDURES A WARNING DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW Se WARNING SHUT OFF THE GAS BEFORE SERVICING THE UNIT 1 4 Remove the blower motor and mounting assembly by following steps 1 through 8 as outlined under BLOWER AND MOTOR in REMOVAL AND REPLACEMENT OF PARTS Loosen the motor mounting bolts Adjust the motor position until the blower is parallel to and 1 4 inch away from the motor mounting plate Check for squareness of the blower to the motor mounting plate at the top bottom left and right of the blower If the blower is square then tighten motor mounting bolts and proceed to step 4 B Ifthe blower is not square continue adjusting until proper spacing is achieved then tighten motor mounting bolts NOTE If
33. NER COVER 5 Grasp the burner and lift out REMOVE SCREWS Page 8 of 64 FULL SIZE GAS CONVECTION OVENS REMOVAL AND REPLACEMENT OF PARTS ji LIFT BURNER OUT burner NOTE Ensure that burner positioning bracket U shaped end is inserted into slot at the rear of the burner chamber 7 Check for proper operation GAS ORIFICE a WARNING DISCONNECT THE ELECTRICAL POWER TO THE SA MACHINE AND FOLLOW LOCKOUT lt TAGOUT PROCEDURES 52 WARNING SHUT OFF THE GAS BEFORE SERVICING THE UNIT 1 Remove the bottom front cover as outlined under COVERS AND PANELS 2 Remove the bolts securing the gas manifold to the oven and place the manifold to the side 3 Remove the gas orifice from the spud on the manifold and replace with the correct orifice for the given altitude Page 9 of 64 wy ORIFICE B 5 5355 4 Reverse procedure to install and check for proper operation GAS SOLENOID VALVE WARNING DISCONNECT THE ELECTRICAL POWER TO THE GESUEP MACHINE AND FOLLOW LOCKOUT amp TAGOUT PROCEDURES WARNING SHUT OFF THE GAS BEFORE SERVICING THE UNIT WARNING ALL GAS JOINTS DISTURBED DURING SERVICING MUST BE CHECKED FOR LEAKS CHECK WITH A SOAP AND WATER SOLUTION BUBBLES DO NOT USE AN OPEN FLAME 1 Remove the control panel and the right side panel as outlined under COVERS AND PANELS NOTE If right side panel is not
34. NK CABLE kus RIGHT SIDE 5 io 5s 1527 SIDE TURNBUCKLE SHORT EYE BOLT DOOR CHAIN ASSEMBLY TOP VIEW DOORS IN CLOSED POSITION 4 If right door does lead the left door in closing A Loosen locknut on both turnbuckles B Loosen left turnbuckle C Tighten right turnbuckle D Tighten locknut on both turnbuckles 5 the right door leads the left door by more than 3 8 inch A Loosen locknut on both turnbuckles B Loosen right turnbuckle C Tighten left turnbuckle D Tighten locknut on both turnbuckles 6 Check doors for proper operation NOTE The locknuts must be tight during testing or the adjustment will not hold A If doors do not close properly repeat step 4 5 and 6 B If doors operate properly continue with procedure 7 Install the lower front cover F32700 February 2006 COMPUTER CONTROL WKGC WKGCX Operation Refer to the Owner s Manual for specific operating instructions Setup Mode NOTE Use the setup mode to verify that the control is configured to the factory settings which result in the proper operation of the oven If the CAL1 parameter is other than zero determine if it is still needed before resetting to zero See COMPUTER CONTROL CALIBRATION WKGC WKGCX CAUTION Changing the C F InP1 rL1 amp rH1 parameters will default all menus 1 Use this key sequence to access the setup mode Up arrow Rack 1 Tempe
35. RES P 97 Remove the racks and right rack support 2 Remove the thermostat knob and mounting screws from the control panel and then remove REMOVE SCREWS the control panel 3 Disconnect lead wires from high limit thermostat then remove high limit thermostat from cover mounting plate 3 Remove the probe guard from the oven cavity wall NOTE When installing the probe should not extend beyond the probe guard 4 Remove the thermostat bulb from the oven cavity by pushing it through the oven wall and into the control panel area NOTE The hole in the oven cavity wall does not line up straight with the oven cavity outer shell therefore the probe must be removed at an angle 5 Reverse the procedure to install 6 Adjust the thermostat as outlined under MECHANICAL THERMOSTAT CALIBRATION WKG WKGX in SERVICE PROCEDURES AND ADJUSTMENTS HIGH LIMIT THERMOSTAT amp WARNING DISCONNECT THE ELECTRICAL POWER TO THE NOTE Remove the old RTV from the cover and Se MACHINE AND FOLLOW LOCKOUT mating surfaces inside the oven cavity and apply TAGOUT PROCEDURES new RTV before installing Se 4 Reverse procedure to install 1 Take out racks from the oven INTERIOR LIGHTS 2 Remove the high limit thermostat cover mounting plate from inside the oven cavity at the top WARNING DISCONNECT THE ELECTRICAL POWER TO THE Si MACHINE AND FOLLOW LOCKOUT TAGOUT PROCEDURES Lamp 1 Remove the racks 2 Unscrew
36. Standard Controls CONTROL PANEL COMPONENT PANEL REAR VIEW FRONT VIEW Geese BE SEM E VIEWED FROM PIN SIDE PLUGS VIEWED FROM FIH SIDE WKGD OWKGDX PLUG SOCKET AHD COMPONENT LOCATIONS STD CONTROLS 10828 F32700 February 2006 T 32 of 64 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION WKG WKGX WKGD WKGDX Plug Socket and Components Roast amp Hold Option CONTROL PANEL COMPONENT PANEL REAR VIEW FRONT VIEW 1 RELAY tS HOLD RELAY MECHANICAL WEOE SOLID STATE WE GIUNTA 9 0 TP MALE PLUS VIEWED PREM BIDE FLUGS VIEWED FROM FIN SIDE WEG WHGX WEGD WKGDX PLUG SOCKET AND COMPONENT LOCATIONS ROAST amp HOLD OPTION 10830 Page 33 of 64 F32700 February 2006 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION WKGC WKGCX Plug Socket and Components Roast amp Hold Standard CONTROL PANEL COMPONENT PANEL REAR VIEW _ FRONT VIEW STATT RELAY 55H SOLD STATE RELAY RELAY BLOCK uc WHOCIWKGC PLUG SOCKET AMD COMPONENT LOCATIONS PLUGS VIEWED FirOb SES COMPUTER CONTROL 10825 F32700 February 2006 Page 34 of 64 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION SEQUENCE OF OPERATION WKG WKGX With Roast amp Hold Option Mechanical KX Thermostat Schematic diagram 10832 will be
37. accessible this component can be serviced by removing the control panel as outlined under COVERS AND PANELS 2 Disconnect the lead wires 3 Disconnect the compression fittings to the valve DISCONNECT FITTINGS F32700 February 2006 FULL SIZE GAS CONVECTION OVENS REMOVAL AND REPLACEMENT OF PARTS 4 Loosen the bolts securing the valve and bracket assembly then remove the screws securing the valve to the bracket LOOSEN BOLTS 5 Reverse the procedure to install the replacement gas valve NOTE Clean the pipe threads and apply pipe joint compound to threads Any pipe joint compound used must be resistant to the action of propane gases 6 Verify gas pressure as outlined under GAS PRESSURE ADJUSTMENT in SERVICE PROCEDURES AND ADJUSTMENTS and check for proper operation IGNITION CONTROL MODULE WARNING DISCONNECT THE ELECTRICAL POWER THE MACHINE AND FOLLOW LOCKOUT 29 TAGOUT PROCEDURES ite WARNING SHUT OFF THE GAS BEFORE SERVICING THE UNIT 1 Remove the right side panel as outlined under COVERS AND PANELS NOTE If right side panel is not accessible this component can be serviced by removing the control panel as outlined under COVERS AND PANELS 2 Loosen the screws securing the mounting bracket to the component panel and remove the bracket F32700 February 2006 CONTROL AREA LOOSEN ES MOUNTING BRACKET BECA
38. after a lockout turn power switch 51 OFF then ON 4 Oven reaches set temperature A Temperature control de energizes internal relay and the normally open N O contacts OPEN 1 Heat light goes out 2 Power removed from heat relay R3 R3 normally open N O contacts OPEN F32700 February 2006 a Power removed from 274 valve main on the gas valve and gas flow to the burner stops NOTE This is considered first stage cooking in the ROAST amp HOLD cycle 5 The oven will continue to cycle on the temperature control until one of the following occurs ROAST amp HOLD time R amp H cooking expires which allows the oven to go into Hold mode Power switch S1 is turned to the OFF or OVEN COOL position or the doors are opened Timer Cycle Roast amp Hold Cooking NOTE The ROAST amp HOLD timer operates independently of the heating cycle until time expires Regulation of the oven temperature is then turned over to the Hold thermostat until one of the following occurs ROAST amp HOLD timer is turned OFF function switch S3 is turned back to Normal ROAST normal cooking or Power switch S1 is turned to the OFF or OVEN COOL position 1 With the power switch turned ON power is supplied to timer 2 Set ROAST amp HOLD timer to desired time Roast amp Hold cooking NOTE To Roast then Hold the cooked product at a fixed temperature the Roast amp Hold timer must be used and the functi
39. al to 350 F Allow the oven temperature to stabilize normally 3 cycles 5 Record the temperature at which the Heat lamp goes OFF and comes ON for at least two complete heating cycles 6 Calculate the differential by subtracting the temperature indicated when the lamp goes out from the temperature indicated when the lamp comes on Differential Heat lamp OFF Heat lamp ON Example 360 lamp off 340 lamp on 20 A The differential calculated should be less than 20 F 1 If the differential is less than 20 F the temperature control circuit is functioning properly a Proceed to step 7 If the differential is more than 20 F a Check the temperature probe as outlined under TEMPERATURE PROBE TEST WKGD WKGDX If the probe is functioning properly then temperature control is malfunctioning a Install a replacement temperature control and check calibration 7 Calculate the average temperature by adding the temperature indicated when the lamp goes out to the temperature indicated when the lamp comes on and dividing this answer by 2 Temp lamp off Temp lamp on 2 Average Temp F32700 February 2006 Example 360 340 2 350 Page 18 of 64 If the average temperature is less than 10 F from the dial setting the thermostat is properly calibrated If the average temperature is more than 10 F from the dial setting the thermostat calibration must be adju
40. ate and the normally open N O set of contacts close a Power is connected through the function switch S3 contacts and the convection fan motor is energized fan speed Hi F32700 February 2006 F32700 February 2006 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION b When the convection fan motor reaches operating speed the centrifugal switch on the motor closes The heat relay R3 is then energized R3 relay contacts normally open N O close and the heating circuit is powered a Ignition control module is energized b No ignition light red comes ON module performs a self diagnostic test for 4 seconds 2nd valve main on the gas valve is energized Gas starts to flow to the burner sparking begins the NO IGNITION light goes out and burner lights Sparking continues for up to 7 seconds or until a flame is established If a flame is SENSED the NO IGNITION light stays out and burner remains lit If a flame is not SENSED after 7 seconds of sparking the NO IGNITION light comes back on 2 valve main on the gas valve is de energized and gas flow to the burner stops Ignition trial cycle repeats after a 15 second purge between cycles for two additional tries before locking out To reset after a lockout turn power switch 51 OFF then ON Oven reaches set temperature and thermostat opens A light goes out B Power removed from heat relay R3 1 R3 normally open N O c
41. cle Normal Roast Cycle 1 Conditions A Oven connected to correct voltage 1 L1 HOT to power switch S1 2 L2 NEUTRAL or SECOND LINE to one side of the following components power ON light heat light temperature control board terminal 9 120VAC or terminal 10 208 240VAC oven cavity lights buzzer ROAST timer motor normal cooking ROAST amp HOLD timer motor heat relay coil R3 convection fan motor common C transformer primary T1 motor speed Hi Low relay coil R1 hold relay coil R2 and the component cooling fan B Oven properly grounded C Gas supply valve ON D Gas combination control valve ON Page 39 of 64 E Power switch S1 OFF F Function switch S3 set to Normal ROAST cycle G Oven light switch S2 ON OFF position has no affect on the function of the Normal ROAST cycle H Temperature control dial set to lowest temperature fully counterclockwise l High limit switch CLOSED J Roast timer normal cooking in the OFF position K Roast and Hold timer in the OFF position L Oven doors Closed 1 Door switch contacts CLOSED M Oven cavity temperature below 140 F Set temperature control dial to desired ROAST then HOLD temperature Roast amp Hold cooking Power switch S1 turned ON A Component cooling fan energized B Power ON light Amber comes ON C Power to one side of the following components Normal ROAST timer terminal 1 ROAST amp HOLD
42. d FRONT VIEW OF MOTOR FROM INSIDE OVEN CAVITY MOTOR ROTATES CLOCKWISE TSP1420 13 Slide blower onto motor shaft until hub is flush with end of shaft then tighten set screws 14 Adjust motor position until blower is parallel to motor mounting plate as outlined under BLOWER ADJUSTMENT in SERVICE PROCEDURES AND ADJUSTMENTS 15 Position motor mounting plate on the rear wall and secure with nuts and washers 16 Replace the baffle panel and SNORKEL 17 Replace the air baffle on the rear wall at the lower right hand corner 18 Remove cardboard from the bottom of the oven cavity 19 Install rack guides and racks 20 Check oven for proper operation OVEN DOORS AND BEARINGS INDEPENDENT DOORS ihe WARNING DISCONNECT THE ELECTRICAL POWER TO THE RUE MACHINE AND FOLLOW LOCKOUT i i 4 TAGOUT PROCEDURES 1 Remove the top front cover and bottom front cover as outlined under COVERS AND PANELS Page 12 of 64 FULL SIZE GAS CONVECTION OVENS REMOVAL AND REPLACEMENT OF PARTS 2 Remove the door switch lever E 3 Remove the lower door seal strip to expose the mounting screws of the door assembly 4 Remove the two 2 lower sill bolts by the lower door shaft and the four 4 counter sunk screws from the lower sill NOTE The door assembly is heavy and will drop down once the last screw is removed If removing door assembly with out assistance t
43. d under DOOR ADJUSTMENT 6 Open right side door and view the left side catch ball and door strike position Ensure catch ball is resting upon the angular surface of door strike Repeat on opposite door NOTE If catch ball is striking the flat surface on door strike shims will be required under the door catch assembly NOTE The catch ball should make contact near the center of door strike A If adjustment is necessary loosen mounting screws then slide door strike from front to back until roller ball rests upon the angular surface of the door strike Tighten screws and check operation B If proper adjustment cannot be achieved add shims beneath the door strike Repeat step 6 DO NOT BEND THE DOOR STRIKE 7 Each oven door should open with a force of 8 to 25 pounds when pulled at the handle The adjustment must allow the doors to remain closed during normal operation and allow opening without exertion by the user NOTE The amount of tension on catch ball determines the opening force of door A Adjust catch ball tension as follows 1 Turn set screw inside the catch assembly housing clockwise to increase tension on catch ball and counterclockwise to decrease tension on catch ball Page 25 of 64 SIDE VIEW CUTAWAY SPRING CATCH BALL DOOR 2 Continue adjustment until proper door operation is achieved DOOR CHAIN ADJUSTMENT SIMULTANEOUS DOORS Introduction When the oven doors are i
44. ectly F32700 February 2006 FULL SIZE GAS CONVECTION OVENS SERVICE PROCEDURES AND ADJUSTMENTS VERIFICATION OF SPARK AT 4 Plug the oven in and set the temperature control to the maximum setting IGNITOR Turn the power switch ON WARNING DISCONNECT THE 6 Sparking should occur after a 4 second delay ELECTRICAL POWER TO THE for a duration of 7 seconds then repeat twice MACHINE AND FOLLOW LOCKOUT after a 15 second purge time Arching from the amp TAGOUT PROCEDURES ignition cable to the oven frame should be i observed DOOR SWITCH ADJUSTMENT WARNING SHUT OFF THE GAS BEFORE SERVICING THE UNIT 24 WARNING DISCONNECT THE 1 Remove the bottom front cover as outlined ELECTRICAL POWER TO THE under COVERS AND PANELS in REMOVAL MACHINE AND FOLLOW LOCKOUT AND REPLACEMENT OF PARTS TAGOUT PROCEDURES 2 Disconnect the high voltage IGNITION CABLE ES from the spark ignitor IGNITION Remove the top front cover as outlined under COVERS AND PANELS 2 Door operation CABLE A Independent doors The switch actuator should be operated by the switch lever when the right door is between 1 and 1 1 2 from being closed B Simultaneous doors The switch actuator should be operated by the switch lever when the right door is 1 2 from being closed 3 If adjustment is necessary bend the switch actuator to obtain the proper setting WARNING DO NOT HOLD THE WIRE WITH SAT LEVERI wc SWITCH ACTUATOR YOUR HA
45. edge of the door 3 Simultaneous doors A If replacing window on the left door remove the handle from the front of the door then remove door seal from the inside edge of the door 1 Lift out the inner door panel and window assembly 2 If replacing window on the right door remove the screws along the inside edge if applicable of the door then remove the inner door panel and window assembly 4 Remove the screws securing the window TABS to the door bracket and lift the window assembly out from the door frame Page 15 of 64 INNER DOOR PANEL ASSEMBLY a GLASS REMOVE SCREWS GLASS TSP1427 5 Reverse procedure to install the replacement window DOOR SWITCH Mir WARNING DISCONNECT THE 275 ELECTRICAL POWER TO THE S MACHINE AND FOLLOW LOCKOUT Ss TAGOUT PROCEDURES 1 Remove the top front cover as outlined under COVERS AND PANELS 2 Disconnect the lead wires to the door switch 3 Remove the switch eT 4 Reverse procedure to install the replacement switch and check for proper adjustment as outlined under DOOR SWITCH ADJUSTMENT in SERVICE PROCEDURES AND ADJUSTMENTS F32700 February 2006 FULL SIZE GAS CONVECTION OVENS REMOVAL AND REPLACEMENT OF PARTS MECHANICAL KX THERMOSTAT WKG WKGX HIGH LIMIT WARNING DISCONNECT THE MOUNTING PLATE ELECTRICAL POWER TO THE ie 6 S H MACHINE AND FOLLOW LOCKOUT ae gt TAGOUT PROCEDU
46. erforming the calculation 9 Ifthe above adjustment can not be obtained install a replacement thermostat and check calibration COUNTERCLOCKWISE TO INCREASE TEMPERATURE CLOCKWISE TO DECREASE TEMPERATURE 1 4 TURN 35 REFERENCE SET POINT _ SCREW THERMOSTAT TSP325 SOLID STATE TEMPERATURE CONTROL TEST WKGD WKGDX WARNING DISCONNECT THE EN ELECTRICAL POWER TO THE Se MACHINE AND FOLLOW LOCKOUT TAGOUT PROCEDURES Se 1 Remove the right side panel as outlined under COVERS AND PANELS in REMOVAL AND REPLACEMENT OF PARTS NOTE If right side panel is not accessible this component can be serviced by removing the control panel as outlined under COVERS AND PANELS 2 Place athermocouple in the geometric center of the oven cavity NOTE Oven temperature must be below 450 NOTE If oven is equipped with the Roast and Hold option turn it to Normal ROAST normal cooking before continuing 3 Setthe temperature control to the maximum setting F32700 February 2006 FULL SIZE GAS CONVECTION OVENS SERVICE PROCEDURES AND ADJUSTMENTS 4 Check machine data plate for correct voltage to oven Refer to diagram below for proper terminal locations and voltages before checking the control Use the correct terminals for the corresponding voltage 5 Turn the ON OFF OVEN COOL switch to ON o o 5 4 3 2 1 H RI WHT PROBE
47. es a micro amp FLAME SENSE current that is monitored by the ignition control module A flame sense current of 0 7 micro amp minimum is required to maintain burner ignition Power Light Lit whenever the power switch S1 is turned to ON or Oven Cool mode Heat Light Lit whenever temperature control is calling for heat No Ignition Light Lit when power is turned ON during ignition trial amp gas purge time and when no flame is detected by flame sensor If the oven fails to ignite after 3 attempts it will remain lit until power is reset Page 29 of 64 yx F32700 February 2006 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION Temperature Probe Gas Valve Dual Solenoid Cooling Fan EIE Senses the oven temperature for the solid state temperature control or the computer control On WKGD WKGDX models converts the temperature into a resistance valve which is monitored by the temperature control board The probe is an RTD resistance temperature detector of the Thermistor type As temperature increases the resistance value decreases On WKGC WKGCX models the probe is a J type thermocouple Allows gas flow to the burner when the 1 valve safety and 27 valve main solenoid coils are both energized Reed Circulates cooler air from rear of oven forward to cool components in the control area Mechanical Temperat
48. fter a lockout turn power switch 51 OFF then ON 4 Oven reaches set temperature A Temperature control de energizes internal relay and the normally open N O contacts OPEN 1 Heat light goes out 2 Power removed from heat relay R3 normally open N O contacts OPEN a Power removed from 274 valve main on the gas valve and gas flow to the burner stops 5 The oven will continue to cycle on the temperature control until the doors are opened or power switch S1 is turned to the OFF or OVEN COOL position Timer Cycle Normal Roast Cooking NOTE The ROAST timer normal cooking operates independently of the heating cycle Additional time can be set or the timer can be turned OFF throughout the cooking cycle 1 With the power switch turned ON power is supplied to timer A Set ROAST timer to desired time normal cooking B Contacts 1 amp 3 close timer motor is energized and timing DOWN begins 2 Time expires on ROAST timer normal cooking A Contacts 1 amp 3 open timer motor is de energized and timing stops B Contacts 1 amp 4 close 1 Buzzer energized and sounds NOTE The buzzer continues to sound until the timer dial is set to the OFF position or additional time is set Page 40 of 64 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION Roast and Hold Cycle NOTE Refer to the Owner s Manual for a detailed explanation of ROAST amp HOLD cooking 1 Conditi
49. ght switch 52 Normal ROAST timer terminal 1 ROAST amp HOLD timer terminal 1 transformer primary T1 and component cooling fan F32700 February 2006 1 Power ON light Amber comes ON 2 Transformer T1 energized a Power 24VAC to one side of the following components heat relay R3 normally open N O contacts high limit connected through the normally closed N C contacts to the 15 valve safety on the dual solenoid gas valve a 1 valve safety on the gas valve energized NOTE Gas does not flow to the burner until the 274 valve main is energized 3 Component cooling fan 4 oven will remain in this condition until the power switch S1 is turned to the OFF or ON position WKGC WKGCX Roast amp Hold Standard on Computer Model Schematic diagram 10835 will be used to explain the electrical sequence of operation for both the ROAST cycle normal cooking and the ROAST amp HOLD cycle Roast Cycle Normal Cooking 1 Conditions A Oven connected to correct voltage 1 L1 HOT to power switch S1 2 L2 NEUTRAL or SECOND LINE to one side of the following components oven cavity lights convection fan motor common C transformer primary T1 component cooling fan and the heat relay coil R1 B Oven properly grounded 1 Ground GND to one side of the following components computer control case NO IGNITION light transformer secondary T1 ignition control modu
50. he ignition cable flame sense lead and gas manifold should also be removed to avoid damage to these components 5 Tilt the top of the door slightly forward and lift the door up until the bottom of the door shaft clears the opening in the sill 6 Lay the door flat to prevent damage 7 The top and bottom bearings are now accessible for inspection and or replacement if needed A If bearings are ok proceed to step 8 B If replacing the top bearing remove the top bearing retainer and top bearing SIDE SHOWN 77 A APIS x _ BEARING RETAINER TOP BEARING SPACER mms 4794 If replacing the bottom bearing remove it from the door shaft or the lower sill opening Page 13 of 64 8 Reverse procedure to install door assembly and check for proper adjustment as outlined under DOOR ADJUSTMENT and DOOR SWITCH ADJUSTMENT in SERVICE PROCEDURES AND ADJUSTMENTS OVEN DOORS SIMULTANEOUS DOORS Assembly Removal 44 WARNING DISCONNECT THE T ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT gt 3 TAGOUT PROCEDURES 1 Remove the top front cover and bottom front cover as outlined under COVERS AND PANELS 2 Remove the door switch lever DOOR SWITCH LEVER oe I ws as Awa 3 Remove the top bearing retainers and top bearings LEFT SIDE SHOWN 77 mtx EV ve D BEARING RETAINER SPACER umm UE 4794
51. ical KX Controls Roast amp Hold Option 54 WKGD WKGDX Solid State Temperature Control 56 WKGD WKGDX Solid State Temperature Control Roast amp Hold Option 58 WKGCX Computer Control Roast amp Hold Standard 60 TROUBEESHOOTING net dala Deeds Ter png reddet genie waka Qut rebos oa Pai iret 62 All ok lace od EUER gs bee ae ap ek as ae 62 Computer Control Models Only 1 63 CONDENSED SPARE PARTS 5 1 64 Wolf Range 2006 Page of 64 b Tr F32700 February 2006 FULL SIZE GAS CONVECTION OVEN GENERAL GENERAL INTRODUCTION Procedures in this manual will apply to all models unless specified Pictures and illustrations can be of any model unless the picture or illustration needs to be model specific FEATURES OPTIONS MODEL CAVITY TEMPERATURE DOORS NORMAL DEPTH CONTROL 50 50 Mechanical KX Independent 1 Hour Dial 5 Hour Dial Optional Optional WKGX Mechanical KX Independent 1 Hour Dial 5 Hour Dial Optional Optional 26 BLOWER 208 240 60 1 Solid State Independent 1 Hour Dial 5 Hour Dial O
52. ing the control panel as outlined under COVERS AND PANELS 2 Disconnect the lead wires to the fan motor by removing wire nuts 3 Remove the screws securing the air deflector to the fan then loosen the tab screw holding the fan to the component panel Rotate the tab so that the fan will clear and remove the fan 4 Reverse the procedure to install the replacement fan and check for proper operation NOTE The fan must be installed so air is pulled from the rear of the oven and blown into the control area The arrow on the fan body indicates AIR FLOW direction and should be pointing toward the controls NOTE Ensure fan is seated SQUARELY against the air tube and the oven bottom NOTE The air deflector should be angled upwards at approximately 30 degrees to properly direct the air flow F32700 February 2006 FULL SIZE GAS CONVECTION OVENS SERVICE PROCEDURES AND ADJUSTMENTS SERVICE PROCEDURES AND ADJUSTMENTS WARNING CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE EXERCISE EXTREME CAUTION AT ALL TIMES IF TEST POINTS ARE NOT EASILY ACCESSIBLE DISCONNECT POWER AND FOLLOW LOCKOUT TAGOUT PROCEDURES ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST SOLID STATE TEMPERATURE CONTROL CALIBRATION WKGD WKGDX 1 Place a thermocouple in the geometric center of the oven cavity Set the ON OFF OVEN COOL switch to ON Set the temperature control di
53. king expires which allows the oven to go into Hold mode Power switch S1 is turned to the OFF or OVEN COOL position or the doors are opened Timer Cycle Roast amp Hold Cooking NOTE The ROAST amp HOLD timer operates independently of the heating cycle until time expires Regulation of the oven temperature is then transferred to the Hold thermostat until one of the following occurs ROAST amp HOLD timer is turned OFF and the function switch S3 is turned back to Normal ROAST normal cooking or power switch 51 is turned to the OFF or OVEN COOL position 1 With the power switch turned ON power is supplied to timer 2 Set ROAST amp HOLD timer to desired time Roast amp Hold cooking NOTE To Roast then Hold the cooked product at a fixed temperature the Roast amp Hold timer must be used and the function switch S3 must also be set to Roast amp Hold as indicated under step1 conditions for the Roast amp Hold cycle A Contacts 1 amp 3 close timer motor is energized and timing DOWN begins 3 Time expires on Roast amp Hold timer A Contacts 1 amp 3 open timer motor is de energized and timing stops B Contacts 1 amp 4 close 1 oven was heating then the gas burner and heat light go out If the oven was not heating then the gas burner and heat light remain out 2 Hold relay R2 is energized R2 contacts change state and the normally open N O contacts close a Power
54. kout turn power switch 31 OFF then ON 5 Oven reaches the FIXED hold temperature and hold thermostat opens A light goes out B Power removed from heat relay R3 and the contacts open N O 1 Ignition control module de energized a Power removed from 2 valve main on the gas valve and gas flow to the burner stops C Power is also removed from motor speed relay R1 1 Convection fan motor de energized and fan stops rotating 6 The oven will continue to cycle on the hold thermostat until the ROAST amp HOLD timer is turned to the OFF position and the function switch S3 is change back to ROAST normal cooking or the power switch S1 is turned to the OFF or OVEN COOL position Oven Cool Cycle Solid State Temperature Control NOTE The electrical sequence of operation for the OVEN COOL cycle is written for ovens with the ROAST amp HOLD option 1 Conditions A Ovenis ON B Oven cavity temperature needs to be lowered C Doors are open 1 Door switch contacts OPEN Roast and Hold timer in the OFF position E Roast timer normal cooking in the OFF position F Function switch S3 set to either Normal ROAST cycle or ROAST amp HOLD cycle F32700 February 2006 A FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION 2 Power Switch S1 turned to OVEN COOL NOTE With door switch contacts OPEN doors open the convection fan motor will still run and continue to c
55. le the 1 valve safety and 274 valve main on the dual solenoid gas valve and computer control pin 9 C3 9 Gas supply valve ON Gas combination control valve ON Power switch 51 OFF Computer control is setup properly and ready to use G Oven light switch S2 ON OFF position has no affect on the function of the ROAST cycle H High limit switch CLOSED JUR 262 Page 44 of 64 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION l Oven doors Closed 1 Door switch contacts CLOSED J Oven cavity temperature below 140 F Power switch S1 turned ON A Power 120VAC to computer control pin 3 C3 3 NOTE Power at pin 3 is not transferred to other components until computer control is energized and operating conditions are met B Power is available to the oven light switch S2 C Power to terminal 1 on solid state relay 1 SSR1 load side and solid state relay 2 SSR2 load side D Component cooling fan energized E Transformer T1 is energized 1 Power 24VAC to one side of the following components heat relay R1 normally open N O contacts high limit connected through the normally closed N C contacts to the 1 valve safety on the dual solenoid gas valve a 1 valve safety on the gas valve energized NOTE Gas does not flow to the burner until the 274 valve main is energized 2 Power 24VAC to the oven computer control a Control is energized a
56. n ON OFF or OVEN COOL Oven Light Switch S2 Controls the oven cavity lights Fan Speed Switch Hi Low S3 Controls blower motor speed between Hi and Low settings Available on standard models WKG WKGX or WKGD WKGDX On models with the ROAST amp HOLD option S3 becomes the Function Switch Function Switch S3 Selects the cooking mode of the oven between Normal ROAST or ROAST amp HOLD and is used in conjunction with the ROAST amp HOLD timer during ROAST amp HOLD cooking The selected mode also determines the fixed blower speed of Hi for Normal ROAST and Low for ROAST amp HOLD In ROAST amp HOLD mode only energizes the hold relay R2 Available on models with ROAST amp HOLD option only On Standard models S3 becomes the Function Switch Buzzer 2 222 xk Signals the end of a Normal ROAST cycle normal cooking when time expires on the Normal ROAST timer Normal Roast Timer Counts the ROAST time normal cooking of the product and signals the buzzer at the end of the cycle On ROAST amp HOLD models only when the function switch 53 is set to Normal ROAST this timer is used Roast amp Hold Timer When the function switch S3 is set to ROAST amp HOLD this timer must used for ROAST amp HOLD cooking When the ROAST then hold time expires and the function switch is set to ROAST amp HOLD this timer is used to transfer control of the oven temperature to the Hold the
57. n N O side wire 28 of the door Switch contacts and connects power to additional components when the door Switch contacts are CLOSED door closed 1 Transformer T1 energized a Power 24VAC to one side of the following components heat relay R3 normally open N O contacts high limit connected through the normally closed N C contacts to the 15 valve safety on the dual solenoid gas valve a 1 valve safety on the gas valve energized NOTE Gas does not flow to the burner until the 2 valve main is energized 2 With door switch closed power is connected through a second set of contacts on the power switch S1 through the thermostat contacts through one set of relay R4 normally closed N C contacts to one side of the centrifugal switch on the convection fan motor a Heat light clear comes ON 3 Power is also connected through the another set of relay R4 normally closed N C contacts to the other side of motor speed relay H1 a Motor speed relay R1 energized contacts change state and the normally open N O set of contacts close a Convection fan motor energized fan speed low NOTE In the ROAST amp HOLD cycle the fan speed is fixed at low b When the convection fan motor reaches operating speed the centrifugal switch on the motor closes The heat relay R3 is then energized R3 relay contacts normally open N O close and the heating circuit is powered
58. n proper adjustment as the doors come together the right door will lead the left door in closing by about 1 4 inch The doors will feel like they are self closing the last 1 2 inch of travel Procedure 1 Remove the lower sill cover as outline under COVERS AND PANELS in REMOVAL AND REPLACEMENT OF PARTS 2 Close doors and check door chain for factory setting A Turnbuckles should be 5 to 5 1 2 inches apart B Short eye bolt should be connected to the end of the chain that goes to the front of the sprocket C Atthe rear of the sprocket one open link of the chain should be partially engaged with a tooth on the sprocket the next open link should not be engaged completely empty and the last open link should be secured to the long eye bolt D Chain must be tight enough that the doors move simultaneously when opened or closed E When the doors are opened the turnbuckles will move away from each other F32700 February 2006 FULL SIZE GAS CONVECTION OVENS SERVICE PROCEDURES AND ADJUSTMENTS F The stop cable must be positioned where it moves freely and does not get pinched 3 Position door chain assembly to factory setting if the conditions in step 2 are not met SPROCKET 1 OPEN LINK LONG EYE FL BOLT PA x EL LL 1 DT T 1 LINK PARTIALLY ENGAGED ON TOOTH CROSS SECTION OF SPROCKET AND CHAIN LONG EVE BOLT 1 OPEN DOOR STOP 1 INE LI
59. nction switch S3 set to Normal ROAST C D Power ON light Amber comes ON Power to one side of the following components Normal ROAST timer terminal 1 ROAST amp HOLD timer terminal 1 transformer primary T1 NOTE Power is available to the oven light switch wire 20 to turn the oven cavity lights ON when the light switch is turned ON and power is available to the normally open N O side wire 28 of the door switch contacts and connects power to additional components when the door switch contacts are CLOSED door closed 1 Transformer T1 energized a Power 24VAC to one side of the following components heat relay R3 normally open N O contacts high limit connected through the normally closed N C contacts to 1 valve safety on the dual solenoid gas valve a 1 valve safety on the gas valve energized NOTE Gas does not flow to the burner until the 27 valve main is energized 2 With door switch closed power is connected back through a second set of contacts on the power switch S1 through the thermostat contacts through one set of relay R4 normally closed N C contacts to one side of the centrifugal switch on the convection fan motor a Heat light clear comes ON 3 Power is also connected through the other set of relay R4 normally closed N C contacts to the other side of motor speed relay R1 a Motor speed relay R1 energized contacts change st
60. nd performs a power ON self test before energizing outputs NOTE If the control passes self test then the outputs are energized and operation sequence continues If control does not pass self test then the corresponding error code is displayed b Computer control senses oven cavity temperature a With the oven cavity temperature below set point the controls 120VAC output from pin C3 2 is activated and power is connected to the common C side of the centrifugal switch contacts on the convection fan motor NOTE The set point temperature of the computer control will be the last temperature that was set Page 45 of 64 NOTE Power is not applied to the heat relay coil R1 until the centrifugal switch contacts on the convection fan motor close controls 5VDC output from pins C2 2 and C2 8 is activated and SSR1 relay is energized a Convection fan motor is energized fan speed hi b When the convection fan motor reaches operating speed the centrifugal switch N O on the motor closes With the 120VAC output from the control activated and the centrifugal switch on the convection fan motor closed power is applied to the heat relay coil R1 a Heat relay coil R1 is energized R1 contacts N O close and the heating circuit is powered b Oven HEAT LIGHT on the control comes ON c Ignition control module is energized a No ignition light red comes ON module performs
61. old Option vite prar eC PAGE 1 OF 2 SEE 10838 10838 F32700 February 2006 Page 54 of 64 a i RETRY PAm pn j FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION 4 PAGE 2 OF 2 FOR 200 240 WALT SEE 10838 SUPPLY CONNECT LELE TE Page 55 of 64 P F32700 February 2006 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION WKGD WKGDxX Solid State Temperature Control SOU STATE TEMPERATURE CONTRI ee 2 ee PAGE 1 OF 2 SEE 10841 10840 F32700 February 2006 F Page 56 of 64 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION MOTOR 2 i i E PAGE 2 OF 2 SEE 10840 F32700 February 2006 Page 57 of 64 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION WKGD WKGDX Solid State Temperature Control Roast amp Hold Option 1 mm 1 a DOLI STATE TEMP CONTROL i e e ear 2008 2439 20 247 imm v TeCISETETAT MOLE LEN NIU ICD F32700 February 2006 58 of 64 eee t m PAGE 1 OF 2 SEE 10843 10842 FULL SIZE GAS CONVECTION OVENS ELECTR
62. on switch S3 must also be set to Roast amp Hold as indicated under step1 conditions for the Roast amp Hold cycle A Contacts 1 amp 3 close timer motor is energized and timing DOWN begins 3 Time expires on Roast amp Hold timer A Contacts 1 amp 3 open timer motor is de energized and timing stops B Contacts 1 amp 4 close 1 oven was heating then the gas burner and heat light go out If the oven was not heating then the gas burner and heat light remain out NOTE The Temperature control board remains powered and the internal relay contacts remain closed as long as oven cavity temperature is below the 175 F minimum set point temperature of the board and power is ON 2 Poweris connected through function switch S3 Hold relay R2 is then energized R2 contacts change state and the normally open N O contacts close Page 42 of 64 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION a Power to one side of hold thermostat NOTE When temperature is above 160 F 12 the hold thermostat contacts are open 3 Motor speed relay R1 de energized R1 contacts change state and the normally open N O contacts OPEN a Convection fan motor stops and centrifugal switch N O on motor OPENS a Heat relay R3 de energized relay R3 contacts open and oven heating stops NOTE This is considered second stage cooking in the ROAST amp HOLD cycle where the stored heat in
63. onds or until a flame is established If a flame is SENSED the NO IGNITION light stays out and burner remains lit If a flame is not SENSED after 7 seconds of sparking the NO IGNITION light comes back 2 valve main on the gas valve is de energized and gas flow to the burner stops Ignition FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION trial cycle repeats after a 15 second purge between cycles for two additional tries before locking out To reset after a lockout turn power switch S1 OFF then ON 5 Oven reaches the fixed HOLD temperature and the hold thermostat opens A Heat light goes out B Power removed from heat relay R3 and the contacts open N O 1 Ignition control module de energized a Power removed from 274 valve main on the gas valve and gas flow to the burner stops C Power is also removed from motor speed relay R1 2 1 Convection fan motor de energized and fan stops rotating 6 The oven will continue to cycle on the hold thermostat until the ROAST amp HOLD timer is turned to the OFF position the function switch 53 is changed back to ROAST normal cooking or the power switch S1 is turned to the OFF or OVEN COOL position WKGD WKGDX With Roast amp Hold Option Solid State Temperature Control Schematic diagram 10834 will be used to explain the electrical sequence of operation for both the Normal ROAST cycle normal cooking and the ROAST amp HOLD cy
64. onnections loose 3 1 Cooling fan malfunction No power to temperature control Power switch 51 in OVEN COOL 2 Door or door switch open COMPUTER CONTROL MODELS ONLY SYMPTOM POSSIBLE CAUSES Oven does not heat 1 High limit switch open 2 Probe malfunction 3 Control malfunction High limit thermostat shutting off gas 1 Probe malfunction burner 2 Control malfunction Oven not hot enough 1 Probe malfunction 2 Control range high rH1 setting to low See SETUP MODE under COMPUTER CONTROL WKGC WKGCX 3 Control malfunction Error Codes In the display window the error code will alternate between the code and the oven cavity temperature or dashes if the oven is calling for heat heat light on When the condition causing the error is resolved normal oven operation can resume NOTE To check a SETUP PARAMETER and its corresponding DATA VALUE see SETUP MODE under COMPUTER CONTROL WKGC WKGCX NOTE If the cause of the error is not apparent check for these conditions as they may also cause errors to occur Electrical noise or a noise event excess environmental moisture or temperature or vibration CODE amp PROBLEM PROBABLE CAUSE SOLUTION Er01 ROM checksum error Internal ROM malfunction Cycle power Er02 RAM checksum error Internal RAM malfunction Cycle power Er03 Ambient sensor error Ambient temperature is below 32 F Check ambient temperature at the control Er04 Configuration error Micro
65. ons A Oven connected to correct voltage 1 L1 HOT to power switch S1 2 L2 NEUTRAL or SECOND LINE to one side of the following components power ON light heat light temperature control board terminal 9 120VAC or terminal 10 208 240VAC oven cavity lights buzzer ROAST timer motor normal cooking ROAST amp HOLD timer motor heat relay coil R3 convection fan motor common C transformer primary T1 motor speed Hi Low relay coil R1 hold relay coil R2 and the component cooling fan Oven properly grounded Gas supply valve ON Gas combination control valve ON Power switch 51 OFF Function switch S3 set to ROAST amp HOLD cycle G Oven light switch S2 ON OFF position has no affect on the function of the ROAST amp HOLD cycle H Temperature control dial set to lowest temperature fully counterclockwise l High limit switch CLOSED J Roast timer normal cooking in the OFF position K Roast and Hold timer in the OFF position L Oven doors Closed 1 Door switch contacts CLOSED M Oven cavity temperature below 140 F 2 Set temperature control dial to desired ROAST then Hold temperature Roast amp Hold cooking 3 Power switch S1 turned ON A Component cooling fan energized B Power ON light Amber comes ON C Power to one side of the following components Normal ROAST timer terminal 1 ROAST amp HOLD timer terminal 1 transformer primary T1
66. ontacts open a Power removed from 274 valve main on the gas valve and gas flow to the burner stops The oven will continue to cycle on the thermostat until the doors are opened or the power switch S1 is turned to the OFF or OVEN COOL position Timer Cycle Normal Roast Cooking NOTE The ROAST timer normal cooking operates independently of the heating cycle Additional time can be set or the timer can be turned OFF throughout the cooking cycle 1 With the power switch turned ON power is supplied to timer 2 Set ROAST timer to desired time normal cooking A Contacts 1 amp 3 close timer motor is energized and timing DOWN begins 3 Time expires on ROAST timer normal cooking A Contacts 1 amp 3 open timer motor is de energized and timing stops B Contacts 1 amp 4 close 1 Buzzer energized and sounds NOTE The buzzer continues to sound until the timer dial is set to the OFF position or additional time is set Roast and Hold Cycle NOTE Refer to the Owner s Manual for a detailed explanation of ROAST amp HOLD cooking 1 Conditions A Oven connected to correct voltage 1 L1 HOT to power switch S1 2 L2 NEUTRAL or SECOND LINE to one side of the following components power ON light heat light oven cavity lights buzzer ROAST timer motor normal cooking ROAST amp HOLD timer motor heat relay coil R3 convection fan motor C transformer primary T1 relay coil R4
67. ontrol 3 Unplug the wire harness connector to the control panel components 4 Reverse the procedure to install Right Side Panel 1 Remove the screws which secure the right side of the top front cover bottom front cover and control panel 2 Remove the remaining six screws securing the right side panel RIGHT SIDE REMOVE SCREWS 7 Ny e TSP1424 3 Pull the right side panel out at the bottom then down to remove 4 Reverse the procedure to install F32700 February 2006 FULL SIZE GAS CONVECTION OVENS REMOVAL AND REPLACEMENT OF PARTS CONTROL PANEL PANEL WITH ROAST AND OPTION SHOWN COMPONENTS T Removable Components Procedure WARNING DISCONNECT THE P 3 ELECTRICAL POWER TO THE E ae MACHINE AND FOLLOW LOCKOUT o TTT fa TAGOUT PROCEDURES ei WS TD ee em 1 Remove the control panel as outlined under COVERS AND PANELS nee 2 Remove the component being replaced 3 Reverse the procedure to install the replacement component then check oven for proper operation PANEL WITH STANDARD CONTROLS SHOWN Wai rr arm _ tn sonia Co WRG WKOGX WEGO WARGO 10822 Tc PANEL WITH COMPUTER CONTROL SHOWN CHA nC AL ELECTRONIC BEEPER COMPUTER 7 CONTROL
68. ool the oven However power would be removed from the following components Power ON light goes out Normal ROAST timer ROAST amp HOLD timer transformer T1 de energized and to the component cooling fan Power to motor speed Hi Low relay R1 normally open N O contacts and to common C on hold relay R2 Power is then connected through hold relay R2 normally closed N C contacts to motor speed Hi Low relay R1 coil 1 Motor speed Hi Low relay R1 is energized and contacts change state a Power is connected through motor speed Hi Low relay normally open N O contacts through function switch S3 to Convection fan motor a Convection fan motor energized NOTE If function switch S3 is set to Normal ROAST cycle fan speed will be high if set to ROAST amp HOLD cycle fan speed will be low b When Convection fan motor reaches operating speed the centrifugal switch on the motor closes but no power is available for connection to other components Power to one side of the hold thermostat contacts but is not transferred to other components due to oven cavity temperature above 160 F thermostat OPEN Power to terminal 7 on the solid state temperature control but is not transferred to other components due to temperature control not being powered 3 If door switch is CLOSED doors closed power is supplied to one side of the following components Power ON light Amber oven li
69. play will alternate between the term Probe Test StPt set point and the current oven 1 Set the control to 350 F temperate 2 Access the back of the control panel to disconnect the probe lead wires B Press the up or down arrow keys to make the proper selection C Press the set key again to save the change 3 Install a jumper wire across the probe terminals and exit the temperature set mode This will simulate room temperature 4 Allow the oven temperature to stabilize A Ifthe heat light comes on and the actual normally 3 cycles temperature is room temperature replace the probe 5 Compare the controls set point temperature to the thermocouple meter reading when the heat B If the heat light does not come on or the light goes out actual temperature is not room temperature replace the control A Atemperature variance more than 5 F indicates an adjustment is needed Solid State Relay Test J 1 Remove the right side panel as outlined under COVERS AND PANELS 2 Setthe temperature to 350 F or high enough to keep the heat ON for several minutes 1 To make the adjustment proceed to step 6 2 If temperature variance is less than 5 F computer control is functioning properly 3 Check for 5 VDC on input side of SSR 6 Enter the setup mode as outlined in SETUP MODE under COMPUTER CONTROL A If 5 VDC is present continue to step 4 WKGC WKGCX B If no voltage is present comp
70. processor malfunction Cycle power Er05 EEprom error Power loss while storing data Cycle power Page 63 of 64 TT n F327700 February 2006 FULL SIZE GAS CONVECTION OVENS CONDENSED SPARE PARTS LIST CODE amp PROBLEM PROBABLE CAUSE SOLUTION 06 Zone 1 A D underflow Incorrect sensor type Check the InP1 setup parameter error Measuring temperature outside the Verify it matches your sensor sensor range Check sensor and connections fora reversed or open sensor If the condition causing the error is resolved the error will clear Er07 Zone 1 A D overflow Open sensor Check the InP1 setup parameter error Verify it matches your sensor Check sensor and connections for a reversed or open sensor If the condition causing the error is resolved the error will clear Er10 Stack overflow error Microprocessor malfunction Cycle power Check sensor and connections for a reversed or open sensor Er11 Open sensor error Open sensor Check the InP1 setup parameter Verify it matches your sensor Check sensor and connections for a reversed or open sensor Er12 Shorted sensor Incorrect sensor type Check the InP1 setup parameter Measuring temperature outside the Verify it matches your sensor sensor range Check sensor and connections for a reversed or open sensor CONDENSED SPARE PARTS LIST Part No Description 411690 1 Timer 60 Minute F32700 February 2006 Printed in U S A
71. ptional Optional WKGDX Solid State Independent 1 Hour Dial 5 Hour Dial Optional Optional WKGC 26 5 Computer Independent 24 Hour Built in Built in Optional Digital WKGCX 30 5 Computer Independent 3 24 Hour Built in Built in Optional Digital 1 Simultaneous doors are optional with or w o window 2 Stainless steel doors w o window standard 3 Stainless steel doors with window standard INSTALLATION input BTU Hating Natural Gas 44 000 BTU input at 3 5 in W C Propane Gas 44 000 BTU input at 10 0 in W C Gas Line Pressures Refer to the Owner s Manual for detailed installation instructions on single or stacked ovens OPERATION Natural Recommend in W C 7 0 Min 5 0 Refer to the Owner s Manual for specific operating Propane Recommend in W C 11 0 Min 11 0 instructions Maximum 14 0 in W C Nat or Prop CLEANING TOOLS Refer to the Owner s Manual for specific cleaning instructions Standard e Standard set of hand tools LUBRICATION e VOM with A C current tester Any quality VOM Cavity blower motor has sealed bearings and with a sensitivity of at least 20 000 ohms per volt requires no additional lubrication can be used e Huskey s TF1000 grease or equivalent high Gear Puller to remove blower temperature Teflon grease Special e Temperature tester thermocouple type SPECIFICATIONS l ieee e Manometer Electrical Voltage 120 60 1 Amps 9 0 Amps F32700 February 2006
72. r operation Page 20 of 64 FULL SIZE GAS CONVECTION OVENS SERVICE PROCEDURES AND ADJUSTMENTS 5 Reverse procedure to install Resistance in ohms 10 GAS PRESSURE ADJUSTMENT WARNING DISCONNECT THE ELECTRICAL POWER TO THE 2 MACHINE AND FOLLOW LOCKOUT TAGOUT PROCEDURES WARNING SHUT OFF THE GAS BEFORE SERVICING THE UNIT 1 Remove the right side panel as outlined under COVERS AND PANELS in REMOVAL AND REPLACEMENT OF PARTS NOTE If right side panel is not accessible this component can be serviced by removing the control panel as outlined under COVERS AND PANELS 2 Remove the plug from the manifold pressure port 7 MANIFOLD PRESSURE 3 Install hose barb adapter and attach manometer tube Page 21 of 64 PRESSURE ADJUSTMENT UNDER CAP 4 Remove adjustment screw cap from the gas valve and turn gas supply to the oven back on 5 Plug the unit in and turn the power switch ON 6 Setthe temperature control to its highest setting and allow burner to ignite NOTE Accurate gas pressure adjustments can only be made with the gas on and the burner lit 7 Turn the set screw to obtain the proper gas pressure clockwise pressure increase counterclockwise pressure decrease PRESSURE READINGS IN W C LINE MANIFOLD ae Propane NOTE If the incoming line pressure to the valve is less than the minimum stated then the manifold pressure can not be set corr
73. rature Temperature Down arrow Rack 1 TSP1503C 2 Oncein the setup mode the display will alternate between the parameter and programmed data Tochange data to the factory setting use the arrow keys select the next parameter press the Rack 1 key After the last Parameter and Data is viewed press the Rack 1 key a final time to exit the setup mode and return to operations mode The current set point temperature will be displayed After 1 minute of no key activations the control will return to operation mode 3 Listed are the parameters and data you should find Page 26 of 64 FULL SIZE GAS CONVECTION OVENS SERVICE PROCEDURES AND ADJUSTMENTS ALTERNATING ON 5 Re assemble oven and check for proper MENU DISPLAY operation COMPUTER CONTROL Celsius Fahrenheit M CALIBRATION Guard Band WKGC WKGCX Temperature Compensation 1 Place thermocouple in the geometric center of Input Type 1 the oven cavity Range Low 1 2 Setthe ON OFF OVEN COOL switch to ON Range High 1 A If the set point temperature is 350 F proceed to step 4 Hysteresis B If the set point temperature is other than 350 proceed to step to change the set point temperature is temperature Exit Setup Mode and ret rn to displayed or if call for 3 Press the set key then temperature key to enter heat dashes the temperature set mode Mode displayed A The dis
74. rmostat Available on models with Roast amp Hold option only Door Switch Allows the oven to operate when the doors are closed but stops the oven from operating when the doors are opened F32700 February 2006 28 of 64 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION Blower Motor Operates the oven cavity blower convection fan Also an internal centrifugal switch on the motor is utilized to allow the connection of power to the heat relay R3 when the motor is at operating speed Motor Speed Relay R1 Supplies power to the blower motor through R1 relay contacts Available on models with Roast amp Hold option only Hold Relay R2 Hold relay R2 supplies power to the Hold thermostat for maintaining the fixed hold temperature in the oven cavity after the ROAST amp HOLD time expires Transformer T1 Provides 24VAC power to the ignition control module and heating circuit Solid State Temperature Control WKGD WKGDX Monitors temperature sensor and regulates the oven cavity temperature by controlling the heat relay R3 through the blower motor centrifugal switch contacts High Limit Thermostat Protects the oven from temperatures above 550 F by removing power from the 15 valve safety on the dual solenoid gas valve which stops the flow of gas to the burner Auto resets at 500
75. sted 1 2 Loosen the temperature control knob set screw and remove the knob from the stem Loosen temperature control mounting screws only enough to rotate the control a Place thumb and forefinger on the head of the mounting screws apply pressure and slightly rotate the screw heads body of control in the slot Rotate clockwise to increase temperature and counterclockwise to decrease Center the stem in the opening and re tighten the temperature control mounting screws Replace knob and re tighten set screw Rotate the knob to the lowest temperature setting then back to 350 F Repeat the average temperature calculation in step 7 NOTE Allow the oven to cycle at least two times between adjustments before performing the calculation a Ifthe average temperature still differs more than 10 F from the dial setting adjust the thermostat calibration until the average temperature is within tolerance If the above adjustment cannot be obtained replace the temperature control and check calibration FULL SIZE GAS CONVECTION OVENS SERVICE PROCEDURES AND ADJUSTMENTS MECHANICAL THERMOSTAT CALIBRATION WKG WKGX Place a thermocouple in the geometric center of the oven cavity Set the ON OFF OVEN COOL switch to ON Set the thermostat dial to 350 F Allow the oven temperature to stabilize normally 3 cycles Record the temperature when the thermostat cycles OFF and ON for at least three
76. t continues to cook on residual heat A Convection fan motor is de energized 5 After the oven temperature drops below 150 the heat comes back ON and cycles as needed to maintain the HOLD temperature of 150 F A Convection fan motor energized 6 The oven continues to cycle in this manner until one of the following occurs A The ROAST amp HOLD mode is turned OFF B Power switch 51 is turned to the OFF or OVEN COOL position Oven Cool Cycle Computer Control Model 1 Conditions A Ovenis B Oven cavity temperature needs to be lowered C Doors are open 1 Door switch contacts OPEN D Power switch S1 set to either ON or OFF 2 Power Switch S1 turned to OVEN COOL NOTE With door switch contacts OPEN doors open the convection fan motor will still run and continue to cool the oven A Power is connected through power switch S1 to the convection fan motor high speed terminal 1 Convection fan motor energized 2 When Convection fan motor reaches operating speed the centrifugal switch on the motor closes but no power is available for connection to other components 3 oven will continue to operate in OVEN COOL mode until the power switch 51 is turned to the OFF or ON position Page 46 of 64 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION SCHEMATICS WKG WKGX Mechanical KX Controls Ai BLACK _ _ 120 VOLT qasi an fms o oo gt Gill __ WHITE _
77. the oven continues to cook the product 4 Oven temperature falls below 160 F 12 and hold thermostat contacts close A B Heat light comes ON Motor speed relay R1 is energized R1 contacts change state and the normally open N O contacts CLOSE 1 Convection fan motor energized fan speed low Power is also applied to one side of the centrifugal switch on the convection fan motor through the temperature control internal relay N O contacts When the convection fan motor reaches operating speed the centrifugal switch on the motor closes 1 relay is energized a Heat relay R3 contacts N O close and the heating circuit is powered a Ignition module is energized b No ignition light red comes ON module performs a self diagnostic test for 4 seconds 2nd valve main on the gas valve is energized Gas starts to flow to the burner sparking begins the NO IGNITION light goes out and burner lights Sparking continues for up to 7 seconds or until a flame is established If a flame is SENSED the NO Page 43 of 64 IGNITION light stays out and burner remains lit If a flame is not SENSED after 7 seconds of sparking the NO IGNITION light comes back 2 valve main on the gas valve is de energized and gas flow to the burner stops Ignition trial cycle repeats after a 15 second purge between cycles for two additional tries before locking out To reset after a loc
78. to one side of hold thermostat F32700 February 2006 Page 38 of 64 NOTE When temperature is above 160 F 12 the hold thermostat contacts are open 3 Relay R4 is energized R4 contacts change state and both sets of normally closed N C contacts transfer to the normally open N O position Power is not transferred until the hold thermostat contacts close NOTE This is considered second stage cooking in the ROAST AND HOLD cycle where the stored heat in the oven continues to cook the product Oven temperature falls below 160 F 12 and hold thermostat contacts close A light comes ON B Motor speed relay R1 is energized through one set of R4 N C contacts 1 Convection fan motor energized fan speed low C Poweris applied to one side of the centrifugal switch on the convection fan motor through the other set of R4 N C contacts D When the convection fan motor reaches operating speed the centrifugal switch on the motor closes 1 Heatrelay R3 is energized a Heat relay R3 contacts N O close and the heating circuit is powered a Ignition control module is energized b No ignition light red comes ON module performs a self diagnostic test for 4 seconds 2nd valve main on the gas valve is energized Gas starts to flow to the burner sparking begins the NO IGNITION light goes out and burner lights Sparking continues for up to 7 sec
79. ure Control KX Thermostat WKG WKGX Regulates the oven cavity temperature by controlling the heat relay R3 Hold Thermostat KX through the blower motor centrifugal switch contacts On ROAST amp HOLD models only power is first connected through one set of R4 normally closed contacts N C then through the centrifugal switch contacts on the motor sed Holds the oven cavity temperature at 160 F after ROAST then hold time expires For the oven to operate on the Hold thermostat the ROAST amp HOLD timer must be used and the Function Switch S3 must be set to Available on models with Roast amp Hold option only COMPONENT LOCATION F32700 February 2006 IGNITOR amp gt GAS VALVE FLAME SENSE HIGH LIMIT TOP VIEW BLOWER MOTOR COOLING OVEN LIGHTS FAN THERMOSTAT BULB WKG WKGX TEMPERATURE SENSOR WKGD WKGDX COMPONENT WKGC WKGCX PANEL DOOR SWITCH CONTROL PANEL Page 30 of 64 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION WKG WKGx Plug Socket and Components Standard Controls CONTROL PANEL COMPONENT PANEL REAR VIEW FRONT VIEW BE SEM E PLLA VEEWED PIN SIDE PLUGS VIEWED FIN SIDE WKGNKGX PLUG SOCKET AND COMPONENT LOCATIONS STD CONTROLS 10827 Page 31 of 64 V F32700 February 2006 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION WKGD WKGDxX Plug Socket and Components
80. uter control is A Advance through the menu until CAL1 not functioning properly Calibration Offset appears 4 Check for 120 VAC at load side of SSR 1 If the thermocouple reading is higher terminals 1 amp 2 than set point temperature press the down arrow key and enter a negative offset value that is equal to the number of degrees above the 5 F 1 Replace the SSR and check for tolerance proper operation A f no voltage is present solid state relay is not functioning properly 1 120 VAC is present component is functioning properly Page 27 of 64 _ F32700 February 2006 FULL SIZE GAS CONVECTION OVENS ELECTRICAL OPERATION 2 If the thermocouple reading is lower than set point temperature press the up arrow key and enter a positive offset value that is equal to the number of degrees below the 5 F tolerance 3 Exit the setup mode 7 Allow the oven to cycle at least two times between adjustments A If the temperature variance still differs more than 5 F from the set point verify the correct calibration offset value was entered and retained 1 Adjust the calibration offset value as outlined in step 6 until the cycling temperature is within tolerance B Ifthe above adjustment cannot be obtained replace the computer control and check for proper operation ELECTRICAL OPERATION COMPONENT FUNCTION Power Switch 81 Determines the mode of operatio
81. uters internal COOK timer operates independently of the heating cycle Additional time can be set or the timer can be stopped and re started throughout the cooking cycle Refer to the Owners s Manual for specific operating instructions of the oven Computer Control Roast and Hold Cycle NOTE For a detailed explanation of the ROAST amp HOLD mode refer to the Instructions Manual as outlined under SETTING THE OVEN FOR ROAST amp HOLD and ROAST amp HOLD OPERATION In ROAST amp HOLD mode the operation of the computer control is identical to the normal Cook Cycle with these exceptions 1 Oven ROAST amp HOLD light on the control comes ON 2 Convection fan speed changes from High to Low A The computer control 5VDC output from pins C2 2 and C2 8 is de activated and SSR1 relay is de energized 1 Power 120VAC is removed from convection fan motor high speed terminal B The computer control 5VDC output from pins C2 1 and C2 8 is activated and SSR2 relay is energized 1 Power 120VAC is applied to the convection fan motor low speed terminal F32700 February 2006 3 Atthe end of the ROAST time the electronic beeper sounds momentarily to indicate the end of first stage cooking oven operates normally at the temperature and time selected until time expires 4 The display flashes HOLD as the oven enters HOLD mode This is also considered second stage cooking oven heating stops but produc

Wolf WKGD 126621 Convection Oven User Manual

Contents

Download Pdf Manuals

Related Search

Related Contents